10W multicarrier power amplifier applied to 5G system base station

Abstract

The invention discloses a 10W multicarrier power amplifier applied to a 5G system base station. The 10W multicarrier power amplifier comprises an input/output circuit, a power amplifier circuit, a lownoise amplifier circuit and a radio frequency switch control circuit. The low noise amplifier circuit and the power amplifier circuit control time division working through utilization of the radio frequency switch control circuit. In order to satisfy a requirement of an adjacent channel power ratio (ACPR) and realize the fact that plenty of margin exist, an existing mature predistortion technology is employed. When an output power of the power amplifier is 10W, +/-1.6MHz out-of-band rejection is smaller than or equal to -46dBc, and +/-3.2MHz out-of-band rejection is smaller than or equal to -51dBc. Through high and low temperature experiments, stability and reliability experiments and an HALT experiment, the power amplifier provided by the invention is low in power consumption, total working efficiency is 11%-12%, the requirement of the adjacent channel power ratio (ACPR) is satisfied, working efficiency is high, and reliable and stable working of the power amplifier circuit and the low noise amplifier circuit is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of power amplifiers, in particular to a 10W multi-carrier power amplifier used in a 5G system base station. Background technique [0002] For 5G / 10W multi-carrier power amplifiers, due to the high requirements for adjacent channel rejection (ACPR), good linearity, and high efficiency, for four-stage amplifiers, how to choose the coordination of amplifier tubes at all levels in the design is a challenging problem. question. For the requirements of the efficiency index, the power amplifier tube of our final main amplifier stage can neither choose the power too large nor the power too small. If the power is too large, the power consumption will be large; if the power is too small, the requirement for adjacent channel suppression cannot be met. For power amplifiers with high efficiency requirements and high linearity index requirements, the power back-off technology alone cannot meet the index requirem...

AI Technical Summary

Problems solved by technology

If the power is too large, the power consumption will be large; if the power is too small, it cannot meet the requirements of adjacent channel suppression

For power amplifiers with high efficiency requirements and high linearity index requirements, only power back-off technology cannot meet the index requirements

The 5G / 10W multi-carrier power amplifier works in a time-division state, and the internal power amplifier and low-noise amplifier circuit work in time-division. Under the condition of high volume requirements for the power amplifier, how to ensure the reliability and stability of the power amplifier and the low-noise amplifier circuit is also a technology. challenge

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